migrate file upload sample

Author: jan-tennert

sample/file-upload/common/src/desktopMain/kotlin/io/github/jan/supabase/common/ui/utils/applyDragging.kt

@@ -1,26 +1,29 @@
 package io.github.jan.supabase.common.ui.utils
 
+import androidx.compose.foundation.ExperimentalFoundationApi
+import androidx.compose.foundation.draganddrop.dragAndDropTarget
 import androidx.compose.runtime.MutableState
-import androidx.compose.ui.DragData
 import androidx.compose.ui.ExperimentalComposeUiApi
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.composed
-import androidx.compose.ui.onExternalDrag
+import androidx.compose.ui.draganddrop.DragAndDropEvent
+import androidx.compose.ui.draganddrop.DragAndDropTarget
+import androidx.compose.ui.draganddrop.DragData
+import androidx.compose.ui.draganddrop.dragData
 
-@OptIn(ExperimentalComposeUiApi::class)
+@OptIn(ExperimentalComposeUiApi::class, ExperimentalFoundationApi::class)
 actual fun Modifier.applyDragging(isDragging: MutableState<Boolean>, onSuccess: (List<String>) -> Unit): Modifier {
     return composed {
-        onExternalDrag(
-            onDragStart = {
-                isDragging.value = true
+        dragAndDropTarget(
+            shouldStartDragAndDrop = {
+                it.dragData() is DragData.FilesList
             },
-            onDragExit = {
-                isDragging.value = false
-            },
-            onDrop = {
-                isDragging.value = false
-                if(it.dragData is DragData.FilesList) {
-                    onSuccess((it.dragData as DragData.FilesList).readFiles())
+            target = object : DragAndDropTarget {
+                override fun onDrop(event: DragAndDropEvent): Boolean {
+                    isDragging.value = false
+                    val dragData = event.dragData() as DragData.FilesList
+                    onSuccess(dragData.readFiles())
+                    return true;
                 }
             }
         )